[simion314]

Do you pay cash when you go to restaurants or shopping? If you pay electronically then why do you trust the payment system? (it is not open source,reproducible and for sure your purchases contain much more data then what you imply the QR code scanner collects)

[lmm]

Many Germans refuse to use anything but cash for that very reason, so this isn't a very strong argument.

[emteycz]

Yes. And meal tickets for most people here - so cash equivalent.

[throwaway55421]

Yes.